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NETW204 Ch 03
Introduction to Dynamic Routing Protocols
| Question | Answer |
|---|---|
| Administrative Distance | Trustworthiness rating of a routing information source. Expressed as a numerical value between 0 & 255. The higher the value the lower the trustworthiness rating. A router w/multiple routing protocols in its table will select the route with the lowest AD. |
| Algorithm | Well-defined rule or process for arriving at a solution for a problem. Commonly used to determine the best route for traffic from a particular source to a particular destination. |
| Autonomous System (AS) | Is a collection of routers under a common administration. |
| Classful Routing Protocols | Do not send subnet mask information in routing updates. |
| Classless Routing Protocols | Include the subnet mask with the network address in routing updates |
| Converged | When all intermediate devices have the same consistent network topology in their routing tables, they have converged. |
| Discontiguous | Components that are fragmented. A discontiguous network is composed of a major network that separates another major network. |
| Distance Vector | Routes are advertised as vectors of distance and direction. |
| Exterior Gateway Protocols (EGP) | Used for inter-autonomous system routing which is routing between autonomous systems |
| Interior Gateway Protocols (IGP) | Used for intra-autonomous system routing which is routing inside an autonomous system |
| Link-State Router | A router that uses a link-state routing protocol |
| Link-State | Refers to the status of a link, including the interface IP address/subnet mask, type of network, cost of the link, and any neighbor routers on that link. |
| Path Vector Protocol | A routing protocol that marks and shows the path that update information takes as it diffuses through the network. BGP is a user of this kind of protocol because it verifies what autonomous systems the update has passed through to verify loops. |
| Routing Domain | Same as an Autonomous System |
| Scale | To alter to a certain size according to need. A routing protocol is scalable when the router's routing table grows according to the addition of new networks. |
| Variable Length Subnet Mask (VLSM) | Capability to specify a different subnet mask for the same network number on different subnets. VLSM can help optimize available address space. |
| Vectors | A quantity characterized by a magnitude (ie. hops in a path) and a direction |